87487435657 has 4 divisors (see below), whose sum is σ = 87488027716. Its totient is φ = 87486843600.

The previous prime is 87487435639. The next prime is 87487435667. The reversal of 87487435657 is 75653478478.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9465538681 + 78021896976 = 97291^2 + 279324^2 .

It is a cyclic number.

It is not a de Polignac number, because 87487435657 - 2¹¹ = 87487433609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87487435667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129907 + ... + 438007.

It is an arithmetic number, because the mean of its divisors is an integer number (21872006929).

Almost surely, 2^87487435657 is an apocalyptic number.

It is an amenable number.

87487435657 is a deficient number, since it is larger than the sum of its proper divisors (592059).

87487435657 is a wasteful number, since it uses less digits than its factorization.

87487435657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592058.

The product of its digits is 158054400, while the sum is 64.

The spelling of 87487435657 in words is "eighty-seven billion, four hundred eighty-seven million, four hundred thirty-five thousand, six hundred fifty-seven".